During the academic year 2018-2019, I am organizing the weekly seminar Groups, Actions and von Neumann algebras at the Université Paris-Sud, Orsay.

The seminar features both research and introductory talks on topics including geometric and measured group theory, ergodic theory and von Neumann algebras.

Meetings

Monday September 24

Simeng Wang (Université Paris-Sud)

Noncommutative individual ergodic theorems for groups with polynomial growth

Monday October 8

Rémi Boutonnet (CNRS & Université de Bordeaux)

Proximality and group von Neumann algebras

Monday November 5

Mateusz Wasilewski (KU Leuven)

Non-conjugacy of generator MASAs in q-Gaussian algebras

Monday November 12

Yuhei Suzuki (Nagoya University)

Complete descriptions of intermediate operator algebras by intermediate extensions of dynamical systems

Monday November 19

Juhani Koivisto (Université Paris-Sud)

The classification of amenable locally compact second countable groups up to measure equivalence

Monday December 10

Thiebout Delabie (Université Paris-Sud)

Geometric Property (T)

Monday January 7

Pieter Spaas (UC San Diego)

II₁ factors with a unique McDuff decomposition

Monday February 11

Amaury Freslon (Université Paris-Sud)

Random quantum reflections and cut-off phenomenon

Monday February 18

Sara Brofferio (Université Paris-Sud)

Poisson boundary: from discrete groups to continuous groups